PubMed is NLM's search engine interface for MEDLINE, which is a database of citations and abstracts in the fields of medicine, nursing, dentistry, veterinary medicine, health care systems, and pre-clinical sciences.
MEDLINE indexes approximately 30,000 biomedical journals published in the U.S. and worldwide. Coverage extends back to 1946 with over 30 million citations.
Along with MEDLINE, PubMed also provides access to:
PubMed is a free resource developed and maintained by the National Center for Biotechnology Information at the National Library of Medicine®.